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- Architecture, American 266
- Architecture--United States 266
- Agriculture 100
- Farm ownership 81
- Farm tenancy--Economic aspects 78
- Farms--Oregon 74
- Wheat--Harvesting 70
- Agricultural machinery 57
- Agricultural systems 55
- Agricultural machinery operators 52
- Croplands 48
- Farmers 41
- Driving of horse-drawn vehicles 38
- Harvesting machinery 30
- Combines (Agricultural machinery) 26
- Harvesting 24
- Universities and colleges--Alumni and alumnae 19
- Agricultural laborers 18
- Photography, Stereoscopic 18
- Irrigation canals and flumes 15
